Superheater



Dec. 30, 1930. c. A. scHELLE-Ns ET AL 1,787,021

SUPERHEATER Filed April 2. 192s 2 sheets-sheet` 1 my a. 4f"

Dec- 30, 1930. c. A. scHLLl-:Ns ET Al. l 1,787,021

SUPERHEATER FiledApri 2. 1926,

2 Sheets-$13991; 2'v

Patented Dec. 30, 1930 cameraman A. SCEEL'LENS, orV Me-BLEHEAD; MASSACHUSETTS.

,NERZ` JERSEY, ASSIGNOBSQTO C-S EN('JrINIEHEIRING' COM-l SGHELLENS; r4 MALPLEWOOD- AND UGNE L.

rnmeonannsm orafi. JERSEY, vA Conronnfron; or. DELAWARE SUPERHEATER Application aiea'Api-n 2, 1926; serial No. 99,353;

Tliisinvention: relates to superheaters partlcularly adaptedfor locomotive boilers and 1 is ofthe type in'vvhich superheater tubes are extended into the tire tubes 'of the locomotive .boiler-andare connected to headers.y disposed y I f tubesjoi onesuperheater unit, the tubes being 1in. iront ofthe tube sheet.

Superheaters oi' this type.. as comm'onl57 arranged, require a. large rvariety of' diiierl' ent types tot: superheater' tubes` to be kept 'in` stock to replace superheater. tubes in various parts off the'. same/locomotive boiler and, in order to obtain access tol somedefective f tube',y it has 'heretofore' beennecessaryto removeanumber-of obstructing sound tubes.

f It is va further. object of this invention to provide a superheater whereineach'tube maybe` removed independently of other tubes so repairs is'I minimizedi thatthelabor and time: involved in making y comprisesa more or-lessfan shaped conduit provisien of avsuperhreater` whereinthe 'number of'- joints 'between the' superhea'ter :tubes andl the saturatedI and superheated steam/v headers are minimized. f

A vet further object of the invention is the provision 'et saturated and superheated steam headers havingbranches for connection` with the superheater tubes extended in front of the boiler` sheet, with the branches being free and independent of each other except in 'so far asthey are connected through'ithe superheat-V er tubes, thereby to provide for thev free and therein. l

An object ,of `this arrangement `is theprof fur her obJect vv'of :thek invention is the -isa front elevation of; the tube sheet` of the,locomotiveboiler andthe 4superheater headers, the right half-fof Fig. 2 beingfa front view oi' -thevtubeT- sheet. l 1' f isarplauhvie-wl of'rthe superheater` Fig. 5 isa detailed sectionalA elevation of the detachable joint between two contiguous sections of' a header branch.

liligjlf.` fisa more or less, diagrammatic view, looking downupon the ends of the superheater tubes/to illustrate the staggered' relation ofl the superheatedi and saturated' steam branchesfi y' f` n e Fig. 7 is adetailfot a modified form oi superheated steamv header`Y especially :adapted for use when the saturated steam is throttled, andhavingside outlets below the boiler shell ier theA superheated steam. c As here shown.v the locomotive boiler com-v prises a. shell 10 having the front tube sheet 12- throughwhich kthe iireftube's 14 arek received). The saturated steafmaheader 16 of the super-heater embodying this invention havingthe front and rear walls 18 and 20 respectively.which are inclined downwardlv :and v'forwardly away Jrom'the tube sheet and'which terininate'ina bot-tom wallv 22 provided with a row of depending necks 24 which areadap'ted torbe connected with the header branches;y rlhel header is provided with an enlarged neck 26 inthe upper rearlportion thereof which is adapted to be secured tothe upper portion of the tube sheet around a saturated steam opening 28 therein. The superheated `steam header 30is of more or less rectangular cross section vand extendstransver'sely of the boiler shell inthe lower portionthereoffand forward of the saturated steam header. Said superheate'd stea-mheaderfis' formedwithatop wall32 and aseries ofupstanding necks 34; whichare spaced from each other:'alongthelength ofthe ltop wall and arel adapted for connection ywith the' vbranches "ofe'thefsuperheated steam header.

eso`

The bottom wall 36 of said header extends through an opening in the lower portion of the boiler shell and has a- Hanged opening in the middle thereof to which the locomotive throttle valve 38 may be connected if the locomotive is of the typefwherein the throttleA is installed in the superheated steam line. IiiV the locomotive to which thisinvention is 'applied is of the type wherein the saturatedy steamis throttled before it passes into the superheater. thesaturated steam header may be closed at itsbottom wall and may be provided,as`shown in F ig. 7 with iianged extensions 40 at its opposite ends andonh'opposite sides of the boiler shell for'separate connection with pipes-extended tothe locomotive zo`A 1 the locomotive tubes cylinders on opposite sides of the boiler. e v

The superheater units in'ea'ch half ofthe boiler are identical. of. tubes 42 which are'disposed lin loops in 14 and areV so arrangedv hat each pair of tubes extends into andcut lof'two adjacent locomotive'tubes as is shown in the right hand side of Fig. 2. The similar ends of the two :tubes are Vintegrally united-v with a tube 44jwhile the other similar ends of the tubes are similarly united with a tube are disposed in di- 46. YSaid tubes 44` and 46 ferent horizontal and verticalv planes, Vor the tube.V 46 is disposed at one side of and above the tube 44.l Said tube 44 is connected with the lower end'o'f ashort vertical tube 48 which tube forms a section of a branch ofthe saturated steam header.

Y branch for the superheated steam header.

Said tubes 48 and. 50 are of approximately the rsame height and have their upper and lower ends terminated in approximately/the same horizontal vplane and-in Vline with the top and bottom of the unit.V The pipes V48 5 8 in which'the-pipes 48 and 50 are received.

and 50 of superposed superheater units are .arrangedone immediately abovethe other as illustratedin Fig. l and are connected detachably together in a `steam'tight manner.

withfeach other and with their respective superheater headers by'breakable male `and f female :connections For 'this purpose,lthe

lowerends of said-pipes 48 and 50 arepro-` vided with cup shaped seats 52 in their lower iendsfflvher-upper.v ends` of said pipes 48 and 50"'are; provided with conical seats54jwhich fit into the cup shaped recesses 52 to formV steam tight joints between the two sections.

Thel adjacent joints in the saturatedl andl superheated lsteam branches are detachably clamped securely 'togetherby means of the upper and lower clamping bars V5b, the opposite ends of each are provided with notches Y The -ends of said'v pipes are provided with Vflanges againstwhich said 56are adapted to be forced byclamping bolts Y Y62. One set of clamping bolts serves to con-;

Each comprises a pair Said tube 46v is connected withthe middle or upper portion of a simi-lar buty larger I"tube 50 which 4forms ay clamping bars-v nect the joints of two branch sections. The conical seats 54v of the uppermost saturated steam branch sections are -received within the cup shaped ends 64 of the necks 24 of the saturated steam header and are secured detachably in a iiuid tight'manner by means including a suitable clamping plate 66.Y The lower .ends of the lowermost superheated steam branch VsectionsY are similarly received Vand Ysecured detachably in Vthe`necks 34 of the superheated steam headerBO; 'The open upper ends oi the superheated steam branches andthe lower open ends of the saturated steam branches are closed by suitable removable sealing means 68. As thus arranged, the superimposed branch section..48 cooperate to form branches of the saturated steam header; and ,thejbranches depend vertically downwardly inr front of the tube sheet.V

`'lhe'superimposed branchV sections 50 cooperate to form branches `oil? the superheated steam header;l yand said branches extend vertically upward in front of the tube sheet and thesaturat'ed steam branches. The saturated and superheated steam branches are disposed in different vertical planes or are staggeredv .relativeto each other as is most clearly shown inFig.` 6 and the spacing betweenthe branches lower sectionsare removed andthe sectionsV are sprung out of their engagement with the contignoussections, the springing being permitted due to the heater'tubes. A defective unit can then be withdrawn .through the front of the locom'otive boilerand replaced by an identical sound. section. Thetbranch sections 48 and 5 0 are adapted to be approximately as high as the tubes asso ciated with those sections sothat the y tubes can be {withdrawny freely through the space provided by the detached sections;

Y Asl herearranged all the superheater units in therighthand side of the boiler are identical while. all the superheater units for the left hand side .of the boiler are identical, although the superheater units for the two sides ofthe boiler are slightly different. Vith this arrangement only two types of superheater units need Vbe kept in stock to Y replace any defective lunit in the 'boiler,thus

materially reducingthe investment requiredV resiliency'Y of' the super- Y to maintain a stock offsuperheater units for' Y repair purposes.VL y; n Y The structureY may be otherwise modified 4'0" klooped superheater tubes having free ends connected withl sections' of both sets 'of :ever

Witheiit departing frointheff spirit of tli'e ers, 1 independent' superheatedv and saturated steam headers having 'approximately vparallel 'sectional branches extended therefrom which are freev fromy rigid"interconnections andare free-to flex, meansfdetachably connecting the sections', and looped superheated tubes having free and independent ends which areff'ree'to expand andV flexy inde-p dently of each other connected with saidv branch sectionsf 2. In a super-heater saturated and superheatedy steainheaders each having sectional branches which are structurally independent, whereby they can Hex independently of eachother, means de1 tachably connectingV the branch-sections, and Asuperlieater tubes-connected- With cor` responding sections of both branches.

3;In a superheater for locomotive boiler'sgvsaturated and superheated steam head-v ers having inter-spaced` branches composed' of akv pluralit of v'ihtercommunicating Vsectionsfdeta'clia ly connected in series, the sections of" one branch being structurally independenty of the sections of another branch, and superheater tubes'lconnected Withy the sections of both-branches;

i la In a' superheatei for 'locomotive' boilers, anj upper saturated steam header having spaced'dependingbranches, a lower superheated steam header having spaced upstanding branches arrangedfinfr-ont:of'and in staggered parallel relation 'With the` afore-V said branches, ,said branches composed of intercommunicating sections haviiig'means detachably connecting them in series, and

branches, the branches being structurally free `andin-dependentandzbeing free for relative displacementy due to. differencesexpafnsi'on, g' the sections rdirectly connected with said tubes having their ends terniiiiated about in line with the tops and bottoms f of said tubes. Y

5. In a superheater for locomotive boilers, an'upper saturated steam header having spaced depending branches, a lower super vheated steam header having upstanding branches arranged in front of and iii parallel relation With said depending branches, the branches being structurally independent` said branches composed of intercommunieating sections arranged series, and having inter-fitting male and female end-connections, means detacliably connecting contiguous sections, and superheater tubes connected With said sections.

6. In a superheater for locomotive boilers the combination of a steam header, a plurality of super heater tubes each having an end for locomotive boilers,`

goei 3 provided with a transverseA section Which' is open at f its opposite: ends. and is provided With ball and socket seats at its oppositeV ropen ends saidfsections being arranged in linevvvith interfittinglball and socket seats and connected'with said header and constituting a branch thereof, said interiitting ball and socket' seats `providing flexible connecting means for the sections by Whichthe branch can flex 'along its length; f y

A superheater tube for? locomotive'boil-v ers'having its. ends provided With transverse sectio'nseach having a passagetherethroughv which is open at both endsof the section andl is in communication With the interiorof the S0' tube, said' sections having vattaching means at bothends thereof' and being kdisposed-ad'- jacent and one in front ofv theotherandbeing free and independent of each other.

8. Af superheater tube for locomotive boil)- 8 e'r's having a closely' looped@ section andlhav-V ing its `ends provided With transversesections each havinga passage therethrough ivhichlis in communication with the interi-or of the tube, one section beingA disposedin 9 front and at on'eside of the other section and Y both sections beiii'g' free andin'dfependent of eachlotherand terminated approximately at the top and bottom lines of the looped sectionof the tube.

9. In a superheater. for locomotive boilers, the combinationk of saturated and super?. heated steam headers, superheater tubes having free and independent terminals provid'- ingheader-branches, andineansto` connect 1m,

said branches in inter-communicating series l L. l v

relation With each other and with said headers. y V K f 10; In a superheater for locomotive boil-V ers,- the combination- With a boiler, itssh'ell,y 105 and frontltube sheet, of la saturated steamy headerdisposed at the top'of and in' front'of the tube sheet, a superheated steam header extended through an aperture in. andlocated transversely ofand in the boiler shellY at the bottom thereof and in frontk of the tube sheet and having its bottoml portion exposed beloW said boiler shell, branches connected Wit-lr y said headers and arranged in spaced parallel relation in front of ytlieiube sheet, and super-V H5 heatertubes connected With said branches. e

All. In a superheater for. locomotive boil;-

ers, thecombination with a boiler, its shell,

and front tube sheet, of a saturated steam header disposed at the top of and in front- 126 of the tube sheet, -a superlieatedA steam header rf extended through an aperture in and located transversely of and in the .boiler shell atthe bottom thereof andv in front of the tube sheet and having its bottom portion exp'osedfbelow said boiler slielhlbianelies hav-: ing connections fWith said headers and aryranged in spaced parallel relation in front of thev tube sheet.and super-heater tubesA connectedavith sadbranches: and a throttle valve 130i connected with said exposed portion of said superheated steam-header below said boiler shell. v Y

12. In a superheater for locomotive boilers, the combination with aboiler, its shell, and

`front tube sheet, of a saturated steam .header disposed at thetop of and in front of the tube sheet, asuperheated steam header extended through Yan aperture in and located .transversely of and in the boiler shell at the bottom thereof and in front of the'tube sheet,

.branches having detachableconnections with said headers and arranged in spaced parallel relation infront ofl the tube sheet, said branches` -having intercommunicating secf tions arranged in series, means detachably connecting said sections in the' aforesaid relatioi'nand superheater ltubes connected with the branch sections, and asteam Voutlet pipe connected` with that portion only `of said superheated steam header that is external of said shell. j v Y 13. In a locomotive superheater, the combination of an upper saturated steam header, a lower VsuperheatedsteamV header, alter-v natel -arranfred de endino and u standing'` D D b 4.0' able to admit of the removal 1n a lateral d1- rectionof said sections and the space between said branches vacated vby the remo-ved sections having such dimensions'as to admit of the Withdrawal therethrough of the superheater tube vconnected ywithV Vsaid removed *sections without disturbing the relation oftherothrer sections.`

'14.' In a superheaterfor locomotiveboilers, the combination with the boiler, its shell, and kferont tube sheet,`of a saturatedsteaniheader disposed atv the top of and infront of the tube sheet, and a superheated steam' header mechanically separate from said satu#V rated steam header disposedat the bottom of and'in front of the tubesheet and extended through an aperture in and externally of the boiler shell at the botto-m thereof, said superheated :steam header having secured to itsY external vpartfthereof a superheated steam throttle valve which is located externally of and belowthe bottom of the boiler shell. L VU 7 lgIn a superheater for locomotive boilers, the combinationavith the boiler shell, of saturated and superheated steam headers 10 catedmainlywithin said shell, and superheater tubes connected with saidheaders, said superheated steam header-.lying both within and without said boiler shell andhaving asuperheated steam throttle valve which is located externally of and below said shell andis carried bysaid external part of said superheated steam header. o

Y16. In a superheater for locomotive vboilers, the combination of saturated and superheated vsteam headers which are supported independently of eachother, andl a superheatedV steam Vthrottle valvel directly v con*- nected mechanically with the superheated steam header only'and being free from direct mechanical lconnection with said saturated steam header.-l Y Y n 17. `In :a superheateri for locomotive boilers,the combination with the boilerV shell,;of a saturated steam header, and a superheate'd steam header'Y independent of said saturated steam header and extended through the boiler shell and having means for connection with the superheated steam piping of the boiler A externally only of the shell. 18. In afsuperheater for locomotive boilers, the vcombina-tion with the tube sheet of the boiler, of a fixed saturated steam header locatedat the topof the tube sheet, a vfixed superheated steam header located at the bottom of thetube sheet, and a superheater tube consisting ofa'pipe vextended in looped formation between said headers, the pipe including the ends thereof being free from restrictiveinter-connections between its Y sec.` tions, and the ends having branches which are perpendicular to the body of the tube'and are also free from restrictive inter-connections and-have connections respectively with saidheaders, the arrangement being. such ythat all portions of the superheater tube and its branches are free to expand in accordance with the temperature thereof. y

In testimony whereof, we have signed ourl names to this specification. 1 Y

CHRISTOPHER A.' SCHELLENS.` EUGENE L. SCI-IELLENYS. Y 

